// This file is made available under Elastic License 2.0.
// This file is based on code available under the Apache license here:
//   https://github.com/apache/incubator-doris/blob/master/fe/fe-core/src/main/java/org/apache/doris/catalog/PseudoType.java

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

package com.starrocks.catalog;

import com.google.common.base.Preconditions;
import com.starrocks.thrift.TTypeDesc;

/**
 * A pseudo-type cannot be used as a column data type, but it can be used to declare a function's argument or
 * result type. Each of the available pseudo-types is useful in situations where a function's behavior does not
 * correspond to simply taking or returning a value of a specific SQL data type.
 * <p>
 * Reference: https://www.postgresql.org/docs/12/datatype-pseudo.html
 */
public class PseudoType extends Type {
    public static final PseudoType ANY_ELEMENT = new AnyElementType();
    public static final PseudoType ANY_ARRAY = new AnyArrayType();

    @Override
    protected String prettyPrint(int lpad) {
        return null;
    }

    @Override
    public void toThrift(TTypeDesc container) {
        Preconditions.checkArgument(false, "PseudoType should not exposed to external");
    }

    @Override
    protected String toSql(int depth) {
        return toString();
    }
}
